JP2688647B2 - Integrated keyboard and manufacturing method thereof - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to an integrated keyboard used as a keyboard of a keyboard musical instrument such as an electronic keyboard musical instrument, and a manufacturing method thereof.

[Prior Art and its Problems] In an electronic keyboard musical instrument such as an electronic piano, an electronic organ, an electronic synthesizer, etc., the keyboard is formed by a so-called integral key formed by integrally molding a plurality of white keys or black keys for one octave, for example. What you have done is known. In this case, the integrated white key formed by integrally molding a plurality of white keys and the integrated black key formed by integrally molding a plurality of black keys are individually attached to the keyboard chassis by bolts or the like.

By the way, as described above, the keyboard formed of the integrated white key and the integrated black key is excellent in assembling workability as compared with the keyboard formed of one white key and one black key,
It is suitable for mass production, but since the integrated white key and the integrated black key are molded separately, a dedicated molding die for molding the integrated white key and a dedicated molding die for molding the integrated black key are required. At the same time, a separate molding process for the integrated white key and the integrated black key using these dedicated molds is required, and the assembly work to attach the individually molded integrated white key and integrated black key to the keyboard chassis is troublesome. In that case, there is a problem that it is difficult to position the plurality of white keys and the plurality of black keys.

[Object of the Invention] The present invention has been made in view of the circumstances as described above, and an object of the present invention is to allow a plurality of white keys and a plurality of black keys to be simultaneously molded by the same molding die. An integrated keyboard that can be easily attached to a keyboard chassis with a plurality of integrally molded white keys and a plurality of black keys, and with the white and black keys positioned correctly. An object of the present invention is to provide a method for manufacturing an integrated keyboard that can be easily manufactured.

[Key points of the invention] In order to achieve the above object, an integrated keyboard of the present invention includes a plurality of white keys and a plurality of black keys, and the white keys and the black keys are respectively provided at respective base end portions. In a state where they are individually connected, the white keys and the black keys are integrally connected by bending the thin portion, and the white keys and the black keys are substantially flush with each other. The main point is that they are installed side by side.

Further, in the method for manufacturing an integrated keyboard according to the invention as set forth in claim (2), a plurality of white keys and a plurality of black keys are arranged in a plane so that the white keys and the black keys are flat. The white keys and the black keys are individually connected to each other at their base ends, and are integrally formed so that their base ends face each other and are connected to each other through a thin portion. After the molding, the thin-walled portions between the white keys and the black keys are bent so that the white keys and the black keys are juxtaposed so that they are substantially flush with each other. The main point is what you have done.

[Embodiment] An embodiment of the present invention will be specifically and specifically described with reference to the drawings.

1 (a) and 1 (b) show a plan view and a front view of an integrated keyboard according to an embodiment.

This integral keyboard is integrally formed by two-color molding so that a plurality of white keys 1 and a plurality of black keys 2 for one octave (C to SC) are connected at their base end portions 1a and 2a. Is molded into. Such an integrated keyboard is in the state shown in FIGS. 2 (a), 2 (b) and 3 when the molding is completed. That is, each white key 1 is in an upright state with its key-pressing surface 1b located above, and each black key 2 is in an overturned state with its key-pressing surface 2b located below, so that each white key is on a plane. One and each black key 2
They are arranged with their base end portions 1a and 2a opposed to each other. The white keys 1 and the black keys 2 are individually connected by the strip portions 4 and 5 connected by the thin portion 3. Also, the base end of each white key 1
1a and the base end portion 2a of each black key 2 are connected to the belt-shaped portions 4 and 5 through the thin portions 6 and 7.

On the lower surface side of each white key 1 and each black key 2, there are cross-shaped pressing protrusions 1c for operating a switch when pressing a key,
2c and L-shaped hooks 1d and 2d, which are engaged with the keyboard chassis and serve as stoppers for restricting an upper limit when a key is released, are integrally formed. Also, each white key 1 and each black key 2
A plurality of bolt insertion holes 8 and 9 for fixing the integrated keyboard to the keyboard chassis with bolts, and a plurality of black keys 2 with respect to a plurality of white keys 1 are positioned in the band-shaped portions 4 and 5 that connect the two to each other. A plurality of engaging portions 10 and 11 are provided for this purpose. One of the engaging portions 10 and 11 (engaging portion 10) has a concave shape, and the other (engaging portion 11) has a convex shape, and the thin portion 3
Is bent at a position indicated by a broken line, and the belt-shaped portions 4 and 5 are fitted when they are overlapped with each other. This engaging part 1
By fitting 0 and 11, each black key 2 is positioned at a predetermined position between each white key 1.

Next, a method for manufacturing the integrated keyboard will be described. In this integrated keyboard, first, a plurality of white keys 1 and a plurality of black keys 2 are integrally formed as shown in FIGS. 2 (a), (b) and FIG. 3 described above. The integrated keyboard molded in this way is
After the molding, as shown in FIGS. 1A and 1B, the thin portion 3 is bent at the position of the broken line, and the white keys 1 and the black keys 2 are arranged side by side in parallel with each other ( At this time, the engaging portions 10 and 11 are engaged as shown in FIG. 4, and the black keys 2 are positioned between the white keys 1) and the integrated keyboard in the state of forming the keyboard. can get. Thus, the integrated keyboard manufactured in this manner is attached to the keyboard chassis 12 by a plurality of bolts 13 inserted into the bolt insertion holes 8 and 9 of the belt-shaped portions 4 and 5 that are overlapped as shown in FIG. Fixed against. In this case, the hook 1d of each white key 1 and each black key 2,
2d abuts on a locking wall 12a provided on the keyboard chassis 12. The white key 1 and the black key 2 as described above are initially rotated by the spring force of the thin-walled portions 6 and 7 which function as resin springs when the key is pressed and the thin-walled portions 6 and 7 are used as fulcrums. It returns to the position (Fig. 1 (b)). When the white key 1 and the black key 2 are pressed, the respective pressing protrusions 1c,
2c presses a rubber switch (not shown) as a musical tone generation start instruction means arranged on the keyboard chassis 12 corresponding to each key to turn it on.

In the case of the above embodiment, the plurality of white keys 1 and the plurality of black keys 2 are integrally molded by two-color molding (in this case, the thin portion 3 has the same color as the black key 2). 2 may also be molded in white, and a black layer may be formed on the surface of the black key 2 after plating by plating or the like.

Further, the integral keyboard of the above-mentioned embodiment is formed by integrally molding a plurality of white keys 1 and a plurality of black keys 2 for one octave. However, a plurality of white keys 1 of 2 octaves and 3 octaves and a plurality of white keys 1 of 3 octaves are provided. The black key 2 may be integrally formed.

[Effects of the Invention] As described above, according to the integrated keyboard of the present invention,
In a state where the plurality of white keys and the plurality of black keys are individually connected at their respective base end portions, the respective white keys and the respective black keys are integrally formed by bending the thin portion, and the respective white keys are also formed. And the black keys are arranged side by side so that they are almost flush with each other.
A plurality of white keys and a plurality of black keys can be integrally molded at the same time by the same molding die, and a plurality of white keys and a plurality of black keys can be easily positioned and the white keys and the black keys are correctly positioned. Thus, it can be attached to the keyboard chassis, and the manufacturing cost of the keyboard can be significantly reduced.

Further, according to the method of manufacturing an integrated keyboard of the invention described in claim (2), the integrated key formed by integrally molding the plurality of white keys and the plurality of black keys is bent after the molding. Can be easily and easily manufactured.

[Brief description of the drawings]

The drawings respectively show one embodiment of the present invention. FIGS. 1 (a) and 1 (b) are a plan view and a front view of an integrated keyboard according to the embodiment, and FIGS. 2 (a) and 2 (b) are the same keyboard. A plan view and a front view showing a state at the time of completion of molding, and FIG.
An enlarged perspective sectional view taken along the line II-II of FIG. 4A, and FIGS. 4 and 5 are enlarged sectional views of the main part of FIG. 1B. 1 ... White key, 1a, 2a ... Base end part, 2 ... Black key, 3 ... Thin wall part, 4, 5 ... Strip part (connecting part).

Claims (2)

(57) [Claims] 1. A plurality of white keys and a plurality of black keys, wherein the white keys and the black keys are individually connected at respective base end portions, and the white keys and the black keys are connected to each other. An integrated keyboard, wherein each black key is integrally formed by bending a thin portion, and the white keys and the black keys are arranged side by side so as to be substantially flush with each other. 2. A plurality of white keys and a plurality of black keys are arranged in a plane such that the white keys and the black keys face each other at their base end portions. The keys and the black keys are individually connected at their respective base end portions, and are integrally molded so as to be connected through a thin portion, and after the molding, the white keys and the black keys are integrally molded. A method for manufacturing an integrated keyboard, characterized in that a thin portion between the adjacent keys is bent and the white keys and the black keys are arranged side by side so as to be substantially flush with each other.